2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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29 * From: @(#)if.h 8.1 (Berkeley) 6/10/93
33 #ifndef _NET_IF_VAR_H_
34 #define _NET_IF_VAR_H_
37 * Structures defining a network interface, providing a packet
38 * transport mechanism (ala level 0 of the PUP protocols).
40 * Each interface accepts output datagrams of a specified maximum
41 * length, and provides higher level routines with input datagrams
42 * received from its medium.
44 * Output occurs when the routine if_output is called, with three parameters:
45 * (*ifp->if_output)(ifp, m, dst, rt)
46 * Here m is the mbuf chain to be sent and dst is the destination address.
47 * The output routine encapsulates the supplied datagram if necessary,
48 * and then transmits it on its medium.
50 * On input, each interface unwraps the data received by it, and either
51 * places it on the input queue of an internetwork datagram routine
52 * and posts the associated software interrupt, or passes the datagram to a raw
53 * packet input routine.
55 * Routines exist for locating interfaces by their addresses
56 * or for locating an interface on a certain network, as well as more general
57 * routing and gateway routines maintaining information used to locate
58 * interfaces. These routines live in the files if.c and route.c
63 * Forward structure declarations for function prototypes [sic].
75 #include <sys/queue.h> /* get TAILQ macros */
79 #include <sys/eventhandler.h>
81 #include <sys/lock.h> /* XXX */
82 #include <sys/mutex.h> /* XXX */
83 #include <sys/event.h> /* XXX */
84 #include <sys/_task.h>
86 #define IF_DUNIT_NONE -1
88 #include <altq/if_altq.h>
90 TAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */
91 TAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */
92 TAILQ_HEAD(ifprefixhead, ifprefix);
93 TAILQ_HEAD(ifmultihead, ifmultiaddr);
96 * Structure defining a queue for a network interface.
99 struct mbuf *ifq_head;
100 struct mbuf *ifq_tail;
108 * Structure defining a network interface.
110 * (Would like to call this struct ``if'', but C isn't PL/1.)
114 void *if_softc; /* pointer to driver state */
115 void *if_l2com; /* pointer to protocol bits */
116 TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */
117 char if_xname[IFNAMSIZ]; /* external name (name + unit) */
118 const char *if_dname; /* driver name */
119 int if_dunit; /* unit or IF_DUNIT_NONE */
120 struct ifaddrhead if_addrhead; /* linked list of addresses per if */
122 * if_addrhead is the list of all addresses associated to
124 * Some code in the kernel assumes that first element
125 * of the list has type AF_LINK, and contains sockaddr_dl
126 * addresses which store the link-level address and the name
128 * However, access to the AF_LINK address through this
129 * field is deprecated. Use if_addr or ifaddr_byindex() instead.
131 struct knlist if_klist; /* events attached to this if */
132 int if_pcount; /* number of promiscuous listeners */
133 struct carp_if *if_carp; /* carp interface structure */
134 struct bpf_if *if_bpf; /* packet filter structure */
135 u_short if_index; /* numeric abbreviation for this if */
136 short if_timer; /* time 'til if_watchdog called */
137 struct ifvlantrunk *if_vlantrunk; /* pointer to 802.1q data */
138 int if_flags; /* up/down, broadcast, etc. */
139 int if_capabilities; /* interface capabilities */
140 int if_capenable; /* enabled features */
141 void *if_linkmib; /* link-type-specific MIB data */
142 size_t if_linkmiblen; /* length of above data */
143 struct if_data if_data;
144 struct ifmultihead if_multiaddrs; /* multicast addresses configured */
145 int if_amcount; /* number of all-multicast requests */
146 /* procedure handles */
147 int (*if_output) /* output routine (enqueue) */
148 (struct ifnet *, struct mbuf *, struct sockaddr *,
150 void (*if_input) /* input routine (from h/w driver) */
151 (struct ifnet *, struct mbuf *);
152 void (*if_start) /* initiate output routine */
154 int (*if_ioctl) /* ioctl routine */
155 (struct ifnet *, u_long, caddr_t);
156 void (*if_watchdog) /* timer routine */
158 void (*if_init) /* Init routine */
160 int (*if_resolvemulti) /* validate/resolve multicast */
161 (struct ifnet *, struct sockaddr **, struct sockaddr *);
162 struct ifaddr *if_addr; /* pointer to link-level address */
163 void *if_spare2; /* spare pointer 2 */
164 void *if_spare3; /* spare pointer 3 */
165 int if_drv_flags; /* driver-managed status flags */
166 u_int if_spare_flags2; /* spare flags 2 */
167 struct ifaltq if_snd; /* output queue (includes altq) */
168 const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */
170 void *if_bridge; /* bridge glue */
172 struct lltable *lltables; /* list of L3-L2 resolution tables */
174 struct label *if_label; /* interface MAC label */
176 /* these are only used by IPv6 */
177 struct ifprefixhead if_prefixhead; /* list of prefixes per if */
178 void *if_afdata[AF_MAX];
179 int if_afdata_initialized;
180 struct mtx if_afdata_mtx;
181 struct task if_starttask; /* task for IFF_NEEDSGIANT */
182 struct task if_linktask; /* task for link change events */
183 struct mtx if_addr_mtx; /* mutex to protect address lists */
184 LIST_ENTRY(ifnet) if_clones; /* interfaces of a cloner */
187 typedef void if_init_f_t(void *);
190 * XXX These aliases are terribly dangerous because they could apply
193 #define if_mtu if_data.ifi_mtu
194 #define if_type if_data.ifi_type
195 #define if_physical if_data.ifi_physical
196 #define if_addrlen if_data.ifi_addrlen
197 #define if_hdrlen if_data.ifi_hdrlen
198 #define if_metric if_data.ifi_metric
199 #define if_link_state if_data.ifi_link_state
200 #define if_baudrate if_data.ifi_baudrate
201 #define if_hwassist if_data.ifi_hwassist
202 #define if_ipackets if_data.ifi_ipackets
203 #define if_ierrors if_data.ifi_ierrors
204 #define if_opackets if_data.ifi_opackets
205 #define if_oerrors if_data.ifi_oerrors
206 #define if_collisions if_data.ifi_collisions
207 #define if_ibytes if_data.ifi_ibytes
208 #define if_obytes if_data.ifi_obytes
209 #define if_imcasts if_data.ifi_imcasts
210 #define if_omcasts if_data.ifi_omcasts
211 #define if_iqdrops if_data.ifi_iqdrops
212 #define if_noproto if_data.ifi_noproto
213 #define if_lastchange if_data.ifi_lastchange
214 #define if_recvquota if_data.ifi_recvquota
215 #define if_xmitquota if_data.ifi_xmitquota
216 #define if_rawoutput(if, m, sa) if_output(if, m, sa, (struct rtentry *)NULL)
218 /* for compatibility with other BSDs */
219 #define if_addrlist if_addrhead
220 #define if_list if_link
223 * Locks for address lists on the network interface.
225 #define IF_ADDR_LOCK_INIT(if) mtx_init(&(if)->if_addr_mtx, \
226 "if_addr_mtx", NULL, MTX_DEF)
227 #define IF_ADDR_LOCK_DESTROY(if) mtx_destroy(&(if)->if_addr_mtx)
228 #define IF_ADDR_LOCK(if) mtx_lock(&(if)->if_addr_mtx)
229 #define IF_ADDR_UNLOCK(if) mtx_unlock(&(if)->if_addr_mtx)
230 #define IF_ADDR_LOCK_ASSERT(if) mtx_assert(&(if)->if_addr_mtx, MA_OWNED)
233 * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq)
234 * are queues of messages stored on ifqueue structures
235 * (defined above). Entries are added to and deleted from these structures
236 * by these macros, which should be called with ipl raised to splimp().
238 #define IF_LOCK(ifq) mtx_lock(&(ifq)->ifq_mtx)
239 #define IF_UNLOCK(ifq) mtx_unlock(&(ifq)->ifq_mtx)
240 #define IF_LOCK_ASSERT(ifq) mtx_assert(&(ifq)->ifq_mtx, MA_OWNED)
241 #define _IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
242 #define _IF_DROP(ifq) ((ifq)->ifq_drops++)
243 #define _IF_QLEN(ifq) ((ifq)->ifq_len)
245 #define _IF_ENQUEUE(ifq, m) do { \
246 (m)->m_nextpkt = NULL; \
247 if ((ifq)->ifq_tail == NULL) \
248 (ifq)->ifq_head = m; \
250 (ifq)->ifq_tail->m_nextpkt = m; \
251 (ifq)->ifq_tail = m; \
255 #define IF_ENQUEUE(ifq, m) do { \
257 _IF_ENQUEUE(ifq, m); \
261 #define _IF_PREPEND(ifq, m) do { \
262 (m)->m_nextpkt = (ifq)->ifq_head; \
263 if ((ifq)->ifq_tail == NULL) \
264 (ifq)->ifq_tail = (m); \
265 (ifq)->ifq_head = (m); \
269 #define IF_PREPEND(ifq, m) do { \
271 _IF_PREPEND(ifq, m); \
275 #define _IF_DEQUEUE(ifq, m) do { \
276 (m) = (ifq)->ifq_head; \
278 if (((ifq)->ifq_head = (m)->m_nextpkt) == NULL) \
279 (ifq)->ifq_tail = NULL; \
280 (m)->m_nextpkt = NULL; \
285 #define IF_DEQUEUE(ifq, m) do { \
287 _IF_DEQUEUE(ifq, m); \
291 #define _IF_POLL(ifq, m) ((m) = (ifq)->ifq_head)
292 #define IF_POLL(ifq, m) _IF_POLL(ifq, m)
294 #define _IF_DRAIN(ifq) do { \
297 _IF_DEQUEUE(ifq, m); \
304 #define IF_DRAIN(ifq) do { \
311 /* interface address change event */
312 typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *);
313 EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t);
314 /* new interface arrival event */
315 typedef void (*ifnet_arrival_event_handler_t)(void *, struct ifnet *);
316 EVENTHANDLER_DECLARE(ifnet_arrival_event, ifnet_arrival_event_handler_t);
317 /* interface departure event */
318 typedef void (*ifnet_departure_event_handler_t)(void *, struct ifnet *);
319 EVENTHANDLER_DECLARE(ifnet_departure_event, ifnet_departure_event_handler_t);
321 #define IF_AFDATA_LOCK_INIT(ifp) \
322 mtx_init(&(ifp)->if_afdata_mtx, "if_afdata", NULL, MTX_DEF)
323 #define IF_AFDATA_LOCK(ifp) mtx_lock(&(ifp)->if_afdata_mtx)
324 #define IF_AFDATA_TRYLOCK(ifp) mtx_trylock(&(ifp)->if_afdata_mtx)
325 #define IF_AFDATA_UNLOCK(ifp) mtx_unlock(&(ifp)->if_afdata_mtx)
326 #define IF_AFDATA_DESTROY(ifp) mtx_destroy(&(ifp)->if_afdata_mtx)
328 #define IFF_LOCKGIANT(ifp) do { \
329 if ((ifp)->if_flags & IFF_NEEDSGIANT) \
333 #define IFF_UNLOCKGIANT(ifp) do { \
334 if ((ifp)->if_flags & IFF_NEEDSGIANT) \
335 mtx_unlock(&Giant); \
338 int if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp,
340 #define IF_HANDOFF(ifq, m, ifp) \
341 if_handoff((struct ifqueue *)ifq, m, ifp, 0)
342 #define IF_HANDOFF_ADJ(ifq, m, ifp, adj) \
343 if_handoff((struct ifqueue *)ifq, m, ifp, adj)
345 void if_start(struct ifnet *);
347 #define IFQ_ENQUEUE(ifq, m, err) \
350 if (ALTQ_IS_ENABLED(ifq)) \
351 ALTQ_ENQUEUE(ifq, m, NULL, err); \
353 if (_IF_QFULL(ifq)) { \
357 _IF_ENQUEUE(ifq, m); \
362 (ifq)->ifq_drops++; \
366 #define IFQ_DEQUEUE_NOLOCK(ifq, m) \
368 if (TBR_IS_ENABLED(ifq)) \
369 (m) = tbr_dequeue_ptr(ifq, ALTDQ_REMOVE); \
370 else if (ALTQ_IS_ENABLED(ifq)) \
371 ALTQ_DEQUEUE(ifq, m); \
373 _IF_DEQUEUE(ifq, m); \
376 #define IFQ_DEQUEUE(ifq, m) \
379 IFQ_DEQUEUE_NOLOCK(ifq, m); \
383 #define IFQ_POLL_NOLOCK(ifq, m) \
385 if (TBR_IS_ENABLED(ifq)) \
386 (m) = tbr_dequeue_ptr(ifq, ALTDQ_POLL); \
387 else if (ALTQ_IS_ENABLED(ifq)) \
393 #define IFQ_POLL(ifq, m) \
396 IFQ_POLL_NOLOCK(ifq, m); \
400 #define IFQ_PURGE_NOLOCK(ifq) \
402 if (ALTQ_IS_ENABLED(ifq)) { \
408 #define IFQ_PURGE(ifq) \
411 IFQ_PURGE_NOLOCK(ifq); \
415 #define IFQ_SET_READY(ifq) \
416 do { ((ifq)->altq_flags |= ALTQF_READY); } while (0)
418 #define IFQ_LOCK(ifq) IF_LOCK(ifq)
419 #define IFQ_UNLOCK(ifq) IF_UNLOCK(ifq)
420 #define IFQ_LOCK_ASSERT(ifq) IF_LOCK_ASSERT(ifq)
421 #define IFQ_IS_EMPTY(ifq) ((ifq)->ifq_len == 0)
422 #define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++)
423 #define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len)
424 #define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++)
425 #define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len))
428 * The IFF_DRV_OACTIVE test should really occur in the device driver, not in
429 * the handoff logic, as that flag is locked by the device driver.
431 #define IFQ_HANDOFF_ADJ(ifp, m, adj, err) \
436 len = (m)->m_pkthdr.len; \
437 mflags = (m)->m_flags; \
438 IFQ_ENQUEUE(&(ifp)->if_snd, m, err); \
440 (ifp)->if_obytes += len + (adj); \
441 if (mflags & M_MCAST) \
442 (ifp)->if_omcasts++; \
443 if (((ifp)->if_drv_flags & IFF_DRV_OACTIVE) == 0) \
448 #define IFQ_HANDOFF(ifp, m, err) \
449 IFQ_HANDOFF_ADJ(ifp, m, 0, err)
451 #define IFQ_DRV_DEQUEUE(ifq, m) \
453 (m) = (ifq)->ifq_drv_head; \
455 if (((ifq)->ifq_drv_head = (m)->m_nextpkt) == NULL) \
456 (ifq)->ifq_drv_tail = NULL; \
457 (m)->m_nextpkt = NULL; \
458 (ifq)->ifq_drv_len--; \
461 IFQ_DEQUEUE_NOLOCK(ifq, m); \
462 while ((ifq)->ifq_drv_len < (ifq)->ifq_drv_maxlen) { \
464 IFQ_DEQUEUE_NOLOCK(ifq, m0); \
467 m0->m_nextpkt = NULL; \
468 if ((ifq)->ifq_drv_tail == NULL) \
469 (ifq)->ifq_drv_head = m0; \
471 (ifq)->ifq_drv_tail->m_nextpkt = m0; \
472 (ifq)->ifq_drv_tail = m0; \
473 (ifq)->ifq_drv_len++; \
479 #define IFQ_DRV_PREPEND(ifq, m) \
481 (m)->m_nextpkt = (ifq)->ifq_drv_head; \
482 if ((ifq)->ifq_drv_tail == NULL) \
483 (ifq)->ifq_drv_tail = (m); \
484 (ifq)->ifq_drv_head = (m); \
485 (ifq)->ifq_drv_len++; \
488 #define IFQ_DRV_IS_EMPTY(ifq) \
489 (((ifq)->ifq_drv_len == 0) && ((ifq)->ifq_len == 0))
491 #define IFQ_DRV_PURGE(ifq) \
493 struct mbuf *m, *n = (ifq)->ifq_drv_head; \
494 while((m = n) != NULL) { \
498 (ifq)->ifq_drv_head = (ifq)->ifq_drv_tail = NULL; \
499 (ifq)->ifq_drv_len = 0; \
504 * 72 was chosen below because it is the size of a TCP/IP
505 * header (40) + the minimum mss (32).
508 #define IF_MAXMTU 65535
513 * The ifaddr structure contains information about one address
514 * of an interface. They are maintained by the different address families,
515 * are allocated and attached when an address is set, and are linked
516 * together so all addresses for an interface can be located.
518 * NOTE: a 'struct ifaddr' is always at the beginning of a larger
519 * chunk of malloc'ed memory, where we store the three addresses
520 * (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here.
523 struct sockaddr *ifa_addr; /* address of interface */
524 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */
525 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */
526 struct sockaddr *ifa_netmask; /* used to determine subnet */
527 struct if_data if_data; /* not all members are meaningful */
528 struct ifnet *ifa_ifp; /* back-pointer to interface */
529 TAILQ_ENTRY(ifaddr) ifa_link; /* queue macro glue */
530 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */
531 (int, struct rtentry *, struct rt_addrinfo *);
532 u_short ifa_flags; /* mostly rt_flags for cloning */
533 u_int ifa_refcnt; /* references to this structure */
534 int ifa_metric; /* cost of going out this interface */
535 int (*ifa_claim_addr) /* check if an addr goes to this if */
536 (struct ifaddr *, struct sockaddr *);
539 #define IFA_ROUTE RTF_UP /* route installed */
541 /* for compatibility with other BSDs */
542 #define ifa_list ifa_link
544 #define IFA_LOCK_INIT(ifa) \
545 mtx_init(&(ifa)->ifa_mtx, "ifaddr", NULL, MTX_DEF)
546 #define IFA_LOCK(ifa) mtx_lock(&(ifa)->ifa_mtx)
547 #define IFA_UNLOCK(ifa) mtx_unlock(&(ifa)->ifa_mtx)
548 #define IFA_DESTROY(ifa) mtx_destroy(&(ifa)->ifa_mtx)
551 * The prefix structure contains information about one prefix
552 * of an interface. They are maintained by the different address families,
553 * are allocated and attached when a prefix or an address is set,
554 * and are linked together so all prefixes for an interface can be located.
557 struct sockaddr *ifpr_prefix; /* prefix of interface */
558 struct ifnet *ifpr_ifp; /* back-pointer to interface */
559 TAILQ_ENTRY(ifprefix) ifpr_list; /* queue macro glue */
560 u_char ifpr_plen; /* prefix length in bits */
561 u_char ifpr_type; /* protocol dependent prefix type */
565 * Multicast address structure. This is analogous to the ifaddr
566 * structure except that it keeps track of multicast addresses.
567 * Also, the reference count here is a count of requests for this
568 * address, not a count of pointers to this structure.
571 TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */
572 struct sockaddr *ifma_addr; /* address this membership is for */
573 struct sockaddr *ifma_lladdr; /* link-layer translation, if any */
574 struct ifnet *ifma_ifp; /* back-pointer to interface */
575 u_int ifma_refcount; /* reference count */
576 void *ifma_protospec; /* protocol-specific state, if any */
580 #define IFAFREE(ifa) \
583 KASSERT((ifa)->ifa_refcnt > 0, \
584 ("ifa %p !(ifa_refcnt > 0)", ifa)); \
585 if (--(ifa)->ifa_refcnt == 0) { \
587 free(ifa, M_IFADDR); \
592 #define IFAREF(ifa) \
595 ++(ifa)->ifa_refcnt; \
599 extern struct mtx ifnet_lock;
600 #define IFNET_LOCK_INIT() \
601 mtx_init(&ifnet_lock, "ifnet", NULL, MTX_DEF | MTX_RECURSE)
602 #define IFNET_WLOCK() mtx_lock(&ifnet_lock)
603 #define IFNET_WUNLOCK() mtx_unlock(&ifnet_lock)
604 #define IFNET_RLOCK() IFNET_WLOCK()
605 #define IFNET_RUNLOCK() IFNET_WUNLOCK()
607 struct ifindex_entry {
608 struct ifnet *ife_ifnet;
609 struct cdev *ife_dev;
612 #define ifnet_byindex(idx) ifindex_table[(idx)].ife_ifnet
614 * Given the index, ifaddr_byindex() returns the one and only
615 * link-level ifaddr for the interface. You are not supposed to use
616 * it to traverse the list of addresses associated to the interface.
618 #define ifaddr_byindex(idx) ifnet_byindex(idx)->if_addr
619 #define ifdev_byindex(idx) ifindex_table[(idx)].ife_dev
621 extern struct ifnethead ifnet;
622 extern struct ifindex_entry *ifindex_table;
623 extern int ifqmaxlen;
624 extern struct ifnet *loif; /* first loopback interface */
627 int if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **);
628 int if_allmulti(struct ifnet *, int);
629 struct ifnet* if_alloc(u_char);
630 void if_attach(struct ifnet *);
631 int if_delmulti(struct ifnet *, struct sockaddr *);
632 void if_detach(struct ifnet *);
633 void if_purgeaddrs(struct ifnet *);
634 void if_down(struct ifnet *);
635 void if_free(struct ifnet *);
636 void if_free_type(struct ifnet *, u_char);
637 void if_initname(struct ifnet *, const char *, int);
638 void if_link_state_change(struct ifnet *, int);
639 int if_printf(struct ifnet *, const char *, ...) __printflike(2, 3);
640 int if_setlladdr(struct ifnet *, const u_char *, int);
641 void if_up(struct ifnet *);
642 /*void ifinit(void);*/ /* declared in systm.h for main() */
643 int ifioctl(struct socket *, u_long, caddr_t, struct thread *);
644 int ifpromisc(struct ifnet *, int);
645 struct ifnet *ifunit(const char *);
647 struct ifaddr *ifa_ifwithaddr(struct sockaddr *);
648 struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *);
649 struct ifaddr *ifa_ifwithnet(struct sockaddr *);
650 struct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *);
651 struct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *);
653 int if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen);
655 typedef void *if_com_alloc_t(u_char type, struct ifnet *ifp);
656 typedef void if_com_free_t(void *com, u_char type);
657 void if_register_com_alloc(u_char type, if_com_alloc_t *a, if_com_free_t *f);
658 void if_deregister_com_alloc(u_char type);
660 #define IF_LLADDR(ifp) \
661 LLADDR((struct sockaddr_dl *)((ifp)->if_addr->ifa_addr))
663 #ifdef DEVICE_POLLING
664 enum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS };
666 typedef void poll_handler_t(struct ifnet *ifp, enum poll_cmd cmd, int count);
667 int ether_poll_register(poll_handler_t *h, struct ifnet *ifp);
668 int ether_poll_deregister(struct ifnet *ifp);
669 #endif /* DEVICE_POLLING */
673 #endif /* !_NET_IF_VAR_H_ */